4 * This file contains functions which handle the mapping of Internet addresses
5 * to users on the Citadel system.
17 #include <sys/types.h>
25 #include "sysdep_decls.h"
26 #include "citserver.h"
30 #include "internet_addressing.h"
33 #include "parsedate.h"
46 * Return nonzero if the supplied name is an alias for this host.
48 int CtdlHostAlias(char *fqdn) {
52 char host[256], type[256];
54 if (!strcasecmp(fqdn, config.c_fqdn)) return(hostalias_localhost);
55 if (!strcasecmp(fqdn, config.c_nodename)) return(hostalias_localhost);
56 if (inetcfg == NULL) return(hostalias_nomatch);
58 config_lines = num_tokens(inetcfg, '\n');
59 for (i=0; i<config_lines; ++i) {
60 extract_token(buf, inetcfg, i, '\n');
61 extract_token(host, buf, 0, '|');
62 extract_token(type, buf, 1, '|');
64 if ( (!strcasecmp(type, "localhost"))
65 && (!strcasecmp(fqdn, host)))
66 return(hostalias_localhost);
68 if ( (!strcasecmp(type, "gatewaydomain"))
69 && (!strcasecmp(&fqdn[strlen(fqdn)-strlen(host)], host)))
70 return(hostalias_gatewaydomain);
74 return(hostalias_nomatch);
84 * Return 0 if a given string fuzzy-matches a Citadel user account
86 * FIXME ... this needs to be updated to handle aliases.
88 int fuzzy_match(struct usersupp *us, char *matchstring) {
91 if ( (!strncasecmp(matchstring, "cit", 3))
92 && (atol(&matchstring[3]) == us->usernum)) {
97 for (a=0; a<strlen(us->fullname); ++a) {
98 if (!strncasecmp(&us->fullname[a],
99 matchstring, strlen(matchstring))) {
108 * Unfold a multi-line field into a single line, removing multi-whitespaces
110 void unfold_rfc822_field(char *field) {
114 striplt(field); /* remove leading/trailing whitespace */
116 /* convert non-space whitespace to spaces, and remove double blanks */
117 for (i=0; i<strlen(field); ++i) {
118 if (field[i]=='\"') quote = 1 - quote;
120 if (isspace(field[i])) field[i] = ' ';
121 while (isspace(field[i]) && isspace(field[i+1])) {
122 strcpy(&field[i+1], &field[i+2]);
131 * Split an RFC822-style address into userid, host, and full name
132 * (Originally from citmail.c, and unchanged so far)
135 void process_rfc822_addr(char *rfc822, char *user, char *node, char *name)
140 strcpy(node, config.c_fqdn);
143 /* extract full name - first, it's From minus <userid> */
144 strcpy(name, rfc822);
145 for (a = 0; a < strlen(name); ++a) {
146 if (name[a] == '<') {
148 strcpy(&name[a], &name[a + 1]);
149 } while ((strlen(name) > 0) && (name[a] != '>'));
150 strcpy(&name[a], &name[a + 1]);
153 /* strip anything to the left of a bang */
154 while ((strlen(name) > 0) && (haschar(name, '!') > 0))
155 strcpy(name, &name[1]);
157 /* and anything to the right of a @ or % */
158 for (a = 0; a < strlen(name); ++a) {
165 /* but if there are parentheses, that changes the rules... */
166 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
167 strcpy(name, rfc822);
168 while ((strlen(name) > 0) && (name[0] != '(')) {
169 strcpy(&name[0], &name[1]);
171 strcpy(&name[0], &name[1]);
172 for (a = 0; a < strlen(name); ++a) {
173 if (name[a] == ')') {
178 /* but if there are a set of quotes, that supersedes everything */
179 if (haschar(rfc822, 34) == 2) {
180 strcpy(name, rfc822);
181 while ((strlen(name) > 0) && (name[0] != 34)) {
182 strcpy(&name[0], &name[1]);
184 strcpy(&name[0], &name[1]);
185 for (a = 0; a < strlen(name); ++a)
189 /* extract user id */
190 strcpy(user, rfc822);
192 /* first get rid of anything in parens */
193 for (a = 0; a < strlen(user); ++a)
194 if (user[a] == '(') {
196 strcpy(&user[a], &user[a + 1]);
197 } while ((strlen(user) > 0) && (user[a] != ')'));
198 strcpy(&user[a], &user[a + 1]);
200 /* if there's a set of angle brackets, strip it down to that */
201 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
202 while ((strlen(user) > 0) && (user[0] != '<')) {
203 strcpy(&user[0], &user[1]);
205 strcpy(&user[0], &user[1]);
206 for (a = 0; a < strlen(user); ++a)
210 /* strip anything to the left of a bang */
211 while ((strlen(user) > 0) && (haschar(user, '!') > 0))
212 strcpy(user, &user[1]);
214 /* and anything to the right of a @ or % */
215 for (a = 0; a < strlen(user); ++a) {
223 /* extract node name */
224 strcpy(node, rfc822);
226 /* first get rid of anything in parens */
227 for (a = 0; a < strlen(node); ++a)
228 if (node[a] == '(') {
230 strcpy(&node[a], &node[a + 1]);
231 } while ((strlen(node) > 0) && (node[a] != ')'));
232 strcpy(&node[a], &node[a + 1]);
234 /* if there's a set of angle brackets, strip it down to that */
235 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
236 while ((strlen(node) > 0) && (node[0] != '<')) {
237 strcpy(&node[0], &node[1]);
239 strcpy(&node[0], &node[1]);
240 for (a = 0; a < strlen(node); ++a)
244 /* strip anything to the left of a @ */
245 while ((strlen(node) > 0) && (haschar(node, '@') > 0))
246 strcpy(node, &node[1]);
248 /* strip anything to the left of a % */
249 while ((strlen(node) > 0) && (haschar(node, '%') > 0))
250 strcpy(node, &node[1]);
252 /* reduce multiple system bang paths to node!user */
253 while ((strlen(node) > 0) && (haschar(node, '!') > 1))
254 strcpy(node, &node[1]);
256 /* now get rid of the user portion of a node!user string */
257 for (a = 0; a < strlen(node); ++a)
261 /* strip leading and trailing spaces in all strings */
270 * Back end for convert_internet_address()
271 * (Compares an internet name [buffer1] and stores in [buffer2] if found)
273 void try_name(struct usersupp *us, void *data) {
274 struct trynamebuf *tnb;
275 tnb = (struct trynamebuf *)data;
277 if (!strncasecmp(tnb->buffer1, "cit", 3))
278 if (atol(&tnb->buffer1[3]) == us->usernum)
279 strcpy(tnb->buffer2, us->fullname);
281 if (!collapsed_strcmp(tnb->buffer1, us->fullname))
282 strcpy(tnb->buffer2, us->fullname);
284 if (us->uid != BBSUID)
285 if (!strcasecmp(tnb->buffer1, getpwuid(us->uid)->pw_name))
286 strcpy(tnb->buffer2, us->fullname);
291 * Convert an Internet email address to a Citadel user/host combination
293 int convert_internet_address(char *destuser, char *desthost, char *source)
298 struct quickroom qrbuf;
301 struct trynamebuf tnb;
305 process_rfc822_addr(source, user, node, name);
307 /* Map the FQDN to a Citadel node name
309 hostalias = CtdlHostAlias(node);
311 case hostalias_localhost:
312 strcpy(node, config.c_nodename);
315 case hostalias_gatewaydomain:
316 extract_token(buf, node, 0, '.');
317 safestrncpy(node, buf, sizeof buf);
320 /* Now try to resolve the name
321 * FIXME ... do the multiple-addresses thing
323 if (!strcasecmp(node, config.c_nodename)) {
324 /* Try all local rooms */
325 if (!strncasecmp(user, "room_", 5)) {
326 strcpy(name, &user[5]);
327 for (i=0; i<strlen(name); ++i)
328 if (name[i]=='_') name[i]=' ';
329 if (getroom(&qrbuf, name) == 0) {
330 strcpy(destuser, qrbuf.QRname);
331 strcpy(desthost, config.c_nodename);
332 return rfc822_room_delivery;
336 /* Try all local users */
337 strcpy(destuser, user);
338 strcpy(desthost, config.c_nodename);
339 strcpy(tnb.buffer1, user);
340 strcpy(tnb.buffer2, "");
341 ForEachUser(try_name, &tnb);
342 if (strlen(tnb.buffer2) == 0) return(rfc822_no_such_user);
343 strcpy(destuser, tnb.buffer2);
344 return(rfc822_address_locally_validated);
347 strcpy(destuser, user);
348 strcpy(desthost, node);
349 return(rfc822_address_invalid); /* unknown error */
356 * convert_field() is a helper function for convert_internet_message().
357 * Given start/end positions for an rfc822 field, it converts it to a Citadel
358 * field if it wants to, and unfolds it if necessary.
360 * Returns 1 if the field was converted and inserted into the Citadel message
361 * structure, implying that the source field should be removed from the
364 int convert_field(struct CtdlMessage *msg, int beg, int end) {
377 rfc822 = msg->cm_fields['M']; /* M field contains rfc822 text */
378 for (i = end; i >= beg; --i) {
379 if (rfc822[i] == ':') colonpos = i;
382 if (colonpos < 0) return(0); /* no colon? not a valid header line */
384 key = mallok((end - beg) + 2);
385 safestrncpy(key, &rfc822[beg], (end-beg)+1);
386 key[colonpos - beg] = 0;
387 value = &key[(colonpos - beg) + 1];
388 unfold_rfc822_field(value);
390 lprintf(9, "Key=<%s> Value=<%s>\n", key, value);
393 * Here's the big rfc822-to-citadel loop.
396 /* Date/time is converted into a unix timestamp. If the conversion
397 * fails, we replace it with the time the message arrived locally.
399 if (!strcasecmp(key, "Date")) {
400 parsed_date = parsedate(value);
401 if (parsed_date < 0L) parsed_date = time(NULL);
402 lprintf(9, "Parsed date is %s",
403 asctime(localtime(&parsed_date)));
404 sprintf(buf, "%ld", parsed_date );
405 if (msg->cm_fields['T'] == NULL)
406 msg->cm_fields['T'] = strdoop(buf);
410 else if (!strcasecmp(key, "From")) {
411 process_rfc822_addr(value, user, node, name);
412 lprintf(9, "Converted to <%s@%s> (%s)\n", user, node, name);
413 sprintf(addr, "%s@%s", user, node);
414 if (msg->cm_fields['A'] == NULL)
415 msg->cm_fields['A'] = strdoop(name);
417 if (msg->cm_fields['F'] == NULL)
418 msg->cm_fields['F'] = strdoop(addr);
422 else if (!strcasecmp(key, "Subject")) {
423 if (msg->cm_fields['U'] == NULL)
424 msg->cm_fields['U'] = strdoop(value);
428 /* Clean up and move on. */
429 phree(key); /* Don't free 'value', it's actually the same buffer */
435 * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
437 struct CtdlMessage *convert_internet_message(char *rfc822) {
439 struct CtdlMessage *msg;
445 msg = mallok(sizeof(struct CtdlMessage));
446 if (msg == NULL) return msg;
448 memset(msg, 0, sizeof(struct CtdlMessage));
449 msg->cm_magic = CTDLMESSAGE_MAGIC; /* self check */
450 msg->cm_anon_type = 0; /* never anonymous */
451 msg->cm_format_type = FMT_RFC822; /* internet message */
452 msg->cm_fields['M'] = rfc822;
454 lprintf(9, "Unconverted RFC822 message length = %d\n", strlen(rfc822));
460 /* Locate beginning and end of field, keeping in mind that
461 * some fields might be multiline
465 for (pos=beg; ((pos<=strlen(rfc822))&&(end<0)); ++pos) {
466 if ((rfc822[pos]=='\n')
467 && (!isspace(rfc822[pos+1]))) {
470 if ( (rfc822[pos]=='\n') /* done w. headers? */
471 && ( (rfc822[pos+1]=='\n')
472 ||(rfc822[pos+1]=='\r'))) {
479 /* At this point we have a field. Are we interested in it? */
480 converted = convert_field(msg, beg, end);
482 /* Strip the field out of the RFC822 header if we used it */
484 strcpy(&rfc822[beg], &rfc822[pos]);
488 /* If we've hit the end of the message, bail out */
489 if (pos > strlen(rfc822)) done = 1;
492 /* Follow-up sanity checks... */
494 /* If there's no timestamp on this message, set it to now. */
495 if (msg->cm_fields['T'] == NULL) {
496 sprintf(buf, "%ld", time(NULL));
497 msg->cm_fields['T'] = strdoop(buf);
500 lprintf(9, "RFC822 length remaining after conversion = %d\n",